Please use this identifier to cite or link to this item:
http://repositorio.unicamp.br/jspui/handle/REPOSIP/319449
Type: | Artigo |
Title: | Muon capture on light isotopes measured with the Double Chooz detector |
Author: | Abe, Y. Abrahao, T. Almazan, H. Alt, C. Appel, S. Barriere, J. C. Baussan, E. Bekman, I. Bergevin, M. Bezerra, T. J. C. Bezrukov, L. Blucher, E. Brugiere, T. Buck, C. Busenitz, J. Cabrera, A. Camilleri, L. Carr, R. Cerrada, M. Chauveau, E. Chimenti, P. Collin, A. P. Conover, E. Conrad, J. M. Crespo-Anadon, J. I. Crum, K. Cucoanes, A. S. Damon, E. Dawson, J. V. De Kerret, H. Dhooghe, J. Dietrich, D. Djurcic, Z. dos Anjos, J. C. Dracos, M. Etenko, A. Fallot, M. Felde, J. Fernandes, S. M. Fischer, V. Franco, D. Franke, M. Furuta, H. Gil-Botella, I. Giot, L. Goger-Neff, M. Gomez, H. Gonzalez, L. F. G. Goodenough, L. Goodman, M. C. Haag, N. Hara, T. Haser, J. Hellwig, D. Hofmann, M. Horton-Smith, G. A. Hourlier, A. Ishitsuka, M. Jochum, J. Jollet, C. Kaether, F. Kalousis, L. N. Kamyshkov, Y. Kaneda, M. Kaplan, D. M. Kawasaki, T. Kemp, E. Kryn, D. Kuze, M. Lachenmaier, T. Lane, C. E. Lasserre, T. Letourneau, A. Lhuillier, D. Lima, H. P. Lindner, M. Lopez-Castano, J. M. LoSecco, J. M. Lubsandorzhiev, B. Lucht, S. Maeda, J. Mariani, C. Maricic, J. Martino, J. Matsubara, T. Mention, G. Meregaglia, A. Miletic, T. Milincic, R. Minotti, A. Nagasaka, Y. Navas-Nicolas, D. Novella, P. Oberauer, L. Obolensky, M. Onillon, A. Osborn, A. Palomares, C. Pepe, I. M. Perasso, S. Porta, A. Pronost, G. Reichenbacher, J. Reinhold, B. Rohling, M. Roncin, R. Rybolt, B. Sakamoto, Y. Santorelli, R. Schilithz, A. C. Schonert, S. Schoppmann, S. Shaevitz, M. H. Sharankova, R. Shrestha, D. Sibille, V. Sinev, V. Skorokhvatov, M. Smith, E. Soiron, M. Spitz, J. Stahl, A. Stancu, I. Stokes, L. F. F. Strait, M. Suekane, F. Sukhotin, S. Sumiyoshi, T. Sun, Y. Svoboda, R. Terao, K. Tonazzo, A. Thi, H. H. T. Valdiviesso, G. Vassilopoulos, N. Veyssiere, C. Vivier, M. von Feilitzsch, F. Wagner, S. Walsh, N. Watanabe, H. Wiebusch, C. Wurm, M. Yang, G. Yermia, F. Zimmer, V. |
Abstract: | Using the Double Chooz detector, designed to measure the neutrino mixing angle θ13, the products of μ- capture on C12,C13,N14, and O16 have been measured. Over a period of 489.5 days, 2.3×106 stopping cosmic μ- have been collected, of which 1.8×105 captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent β decays, and, in some cases, β-delayed neutrons. The most precise measurement of the rate of C12(μ-,ν)B12 to date is reported: 6.57-0.21+0.11×103s-1, or (17.35-0.59+0.35)% of nuclear captures. By tagging excited states emitting γs, the ground state transition rate to B12 has been determined to be 5.68-0.23+0.14×103s-1. The heretofore unobserved reactions C12(μ-,να)Li8,C13(μ-,νnα)Li8, and C13(μ-,νn)B12 are measured. Further, a population of βn decays following stopping muons is identified with 5.5σ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of He8, the reaction C13(μ-,να)Li9 is found to be present at the 2.7σ level. Limits are set on a variety of other processes. © 2016 American Physical Society. Using the Double Chooz detector, designed to measure the neutrino mixing angle θ13, the products of μ- capture on C12,C13,N14, and O16 have been measured. Over a period of 489.5 days, 2.3×106 stopping cosmic μ- have been collected, of which 1.8×105 captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent β decays, and, in some cases, β-delayed neutrons. The most precise measurement of the rate of C12(μ-,ν)B12 to date is reported: 6.57-0.21+0.11×103s-1, or (17.35-0.59+0.35)% of nuclear captures. By tagging excited states emitting γs, the ground state transition rate to B12 has been determined to be 5.68-0.23+0.14×103s-1. The heretofore unobserved reactions C12(μ-,να)Li8,C13(μ-,νnα)Li8, and C13(μ-,νn)B12 are measured. Further, a population of βn decays following stopping muons is identified with 5.5σ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of He8, the reaction C13(μ-,να)Li9 is found to be present at the 2.7σ level. Limits are set on a variety of other processes. |
Subject: | Neutrinos, Detectores, Múons |
Country: | Estados Unidos |
Editor: | American Physical Society |
Citation: | Physical Review C - Nuclear Physics. American Physical Society, v. 93, p. , 2016. |
Rights: | aberto |
Identifier DOI: | 10.1103/PhysRevC.93.054608 |
Address: | https://journals.aps.org/prc/abstract/10.1103/PhysRevC.93.054608 |
Date Issue: | 2016 |
Appears in Collections: | IFGW - Artigos e Outros Documentos |
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